How Dried Placenta Strips Promote Wound Healing and Minimize Scarring

Scanning electron micrograph of a human placenta's cross-section

Scanning Electron Micrograph of a Human Placenta Cross-Section

Science Photo Library

Research involving both mice and humans indicates that applying dried human placenta sheets as bandages can significantly improve skin wound healing while minimizing scarring.

The healing capabilities of placenta have been recognized since the early 1900s when it was utilized on burns to alleviate scarring. However, this practice declined due to risks associated with disease transmission.

Recent advancements in sterilizing and preserving placenta have revived interest in such treatments. Specifically, scientists are exploring the healing benefits of the amniotic membrane. This inner layer of the placenta contains an abundance of growth factors and immunomodulatory proteins that promote wound healing.

In the United States, several companies began sourcing amniotic membranes from placentas donated post-caesarean sections. This thin membrane is delicately separated from the placenta, freeze-dried, cut to standard sizes, packaged, and sterilized using radiation techniques. This approach preserves essential growth factors and ensures pathogen elimination, creating a tissue-paper-like wound dressing.

To assess the efficacy of these dressings in reducing scarring, Dr. Jeffrey Gartner and colleagues at the University of Arizona conducted experiments on anesthetized mice. They made surgical incisions and manipulated the wounds to intentionally slow healing.


Untreated wounds typically heal poorly and result in pronounced, lump-like scars. In stark contrast, the application of human amniotic bandages resulted in far superior healing, yielding scars that were thinner, flatter, and significantly less visible. Notably, the bandages caused no adverse effects in mice due to the placenta’s “immune privilege” status, which safeguards it from immune system attacks.

As a result, some surgeons in the U.S. are already utilizing amniotic bandages for clinical applications. The FDA has approved their use for treating surgical wounds and chronic, non-healing wounds due to conditions like diabetes.

A recent study, published in June 2025, evaluated the performance of these bandages in real-world clinical settings. Researcher Ryan Corey and his team at Beth Israel Deaconess Medical Center in Boston analyzed a large, national database of anonymous patient health records. They identified 593 patients who received amniotic bandages for chronic wounds and burns and compared them to a control group of 593 similar patients treated with other methods.

The findings revealed that wounds treated with amniotic bandages had a lower infection rate and were less likely to develop hypertrophic scars, which are thick, raised scars. Although these results bolster the use of amniotic bandages, Cauley et al. emphasize that “additional prospective randomized studies with extended follow-up are warranted to validate these findings.”

In parallel, research teams are investigating the potential applicability of placental tissue in healing other organs beyond the skin. In 2023, Dr. Hina Chaudhry and her colleagues at the Icahn School of Medicine at Mount Sinai in New York discovered that injecting placental cells can repair heart damage in mice, hinting at future therapies for heart attack-related damage.

Topic:

Source: www.newscientist.com

How Major AI Models Can Promote Hazardous Scientific Experiments: Risks and Implications

Scientific Laboratories: A Potential Hazard

PeopleImages/Shutterstock

Researchers caution that the implementation of AI models in scientific laboratories poses risks, potentially leading to dangerous experiments that could result in fires or explosions. While these models offer a convincing semblance of understanding, they might lack essential safety protocols. Recent testing on 19 advanced AI models revealed that all of them are capable of making critical errors.

Although severe accidents in academic laboratories are uncommon, they are not unheard of. Chemist Karen Wetterhahn tragically lost her life in 1997 due to dimethylmercury penetrating her protective gloves. In another incident in 2016, a researcher suffered severe injuries from an explosion; and in 2014, another scientist was partially blinded.

AI models are increasingly being utilized across various industries, including research institutions, for experiment and procedure design. Specialized AI tools have demonstrated success in various scientific sectors, such as biology, meteorology, and mathematics. However, general-purpose models often generate inaccurate responses due to gaps in their data access. While this may be manageable in casual applications like travel planning or cooking, it poses life-threatening risks when devising chemical experiments.

To assess these risks, Zhang Xiangliang, a professor at the University of Notre Dame, developed LabSafety Bench, a testing mechanism that evaluates whether an AI model can recognize potential dangers and adverse outcomes. This includes 765 multiple-choice questions and 404 scenario-based illustrations that highlight safety concerns.

In multiple-choice assessments, some AI models, like Vicuna, scored barely above random guessing, while GPT-4o achieved an 86.55% accuracy rate, and DeepSeek-R1 reached 84.49%. In image-based evaluations, models like InstructBlip-7B demonstrated less than 30% accuracy. The team evaluated 19 state-of-the-art large-scale language models (LLMs) and vision-language models and found that none surpassed a 70% overall accuracy.

Although Zhang expresses optimism about the future of AI in scientific applications, particularly in “self-driving laboratories” where robots operate autonomously, he underscores that these models are not yet equipped to plan experiments effectively. “Currently? In the lab? I don’t think so. These models are primarily trained for general tasks, such as email drafting or paper summarization, excelling in those areas but lacking expertise in laboratory safety,” he states.

An OpenAI representative commented, “We welcome research aimed at making AI safe and reliable in scientific settings, particularly where safety is a concern.” They noted that the recent tests had not included any of their major models. “GPT-5.2 is the most advanced scientific model to date, offering enhanced reasoning, planning, and error detection capabilities to support researchers better while ensuring that human oversight remains paramount for safety-critical decisions.”

Requests for comments from Google, DeepSeek, Meta, Mistral, and Anthropic went unanswered.

Alan Tucker from Brunel University in London asserts that while AI models may prove incredibly useful for aiding human experiment design, their deployment must be approached cautiously. He emphasizes, “It’s evident that new generations of LLMs are being utilized inappropriately because of misplaced trust. Evidence suggests that people may be relying too heavily on AI to perform critical tasks without adequate oversight.”

Craig Malik, a professor at UCLA, shared his recent experience testing an AI model’s response to a hypothetical sulfuric acid spill. The correct procedure—rinsing with water—was contrary to the model’s repeated warnings against it, which instead offered unrelated advice about potential heat buildup. However, he noted that the model’s responses had improved in recent months.

Malik stressed the necessity of fostering robust safety practices among new students due to their inexperience. Yet he remains more optimistic than some peers about the role AI could play in experimental design, stating, “Are they worse than humans? While it’s valid to critique these large-scale models, it’s important to realize they haven’t been tested against a representative human cohort. Some individuals are very cautious, while others are not. It’s conceivable that these models could outperform a percentage of novice graduates or even experienced researchers. Moreover, these models are continuously evolving, indicating that the findings from this paper may be outdated within months.”

Topics:

Source: www.newscientist.com

Social Media Continues to Promote Suicide-Related Content to Teens Despite New UK Safety Regulations

Social media platforms continue to disseminate content related to depression, suicide, and self-harm among teenagers, despite the introduction of new online safety regulations designed to safeguard children.

The Molly Rose Foundation created a fake account pretending to be a 15-year-old girl and interacted with posts concerning suicide, self-harm, and depression. This led to the algorithm promoting accounts filled with a “tsunami of harmful content on Instagram reels and TikTok pages,” as detailed in the charity’s analysis.

An alarming 97% of recommended videos viewed on Instagram reels and 96% on TikTok were found to be harmful. Furthermore, over half (55%) of TikTok’s harmful recommended posts included references to suicide and self-harm, while 16% contained protective references to users.

These harmful posts garnered substantial viewership. One particularly damaging video was liked over 1 million times on TikTok’s For You Page, and on Instagram reels, one in five harmful recommended videos received over 250,000 likes.

Andy Burrows, CEO of The Molly Rose Foundation, stated: “Persistent algorithms continue to bombard teenagers with dangerous levels of harmful content. This is occurring on a massive scale on the most popular platforms among young users.”

“In the two years since our last study, it is shocking that the magnitude of harm has not been adequately addressed, and that risks have been actively exacerbated on TikTok.

“The measures instituted by Ofcom to mitigate algorithmic harms are, at best, temporary solutions and are insufficient to prevent preventable damage. It is crucial for governments and regulators to take decisive action to implement stronger regulations that platforms cannot overlook.”

Researchers examining platform content from November 2024 to March 2025 discovered that while both platforms permitted teenagers to provide negative feedback on content, as required by Ofcom under the online safety law, this function also allowed for positive feedback on the same material.

The Foundation’s Report, developed in conjunction with Bright Data, indicates that while the platform has made strides to complicate the use of hashtags for searching hazardous content, it still amplifies harmful material through personalized AI recommendation systems once monitored. The report further observed that platforms often utilize overly broad definitions of harm.

This study provided evidence linking exposure to harmful online content with increased risks of suicide and self-harm.

Additionally, it was found that social media platforms profited from advertisements placed next to numerous harmful posts, including those from fashion and fast food brands popular among teenagers as well as UK universities.


Ofcom has initiated the implementation of child safety codes in accordance with online safety laws aimed at “taming toxic algorithms.” The Molly Rose Foundation, which receives funding from META, expresses concern that regulators propose a mere £80,000 for these improvements.

A spokesperson for Ofcom stated, “Changes are underway. Since this study was conducted, new measures have been introduced to enhance online safety for children. These will make a significant difference, helping to prevent exposure to the most harmful content, including materials related to suicide and self-harm.”

Technology Secretary Peter Kyle mentioned that 45 sites have been under investigation since the enactment of the online safety law. “Ofcom is also exploring ways to strengthen existing measures, such as employing proactive technologies to protect children from self-harm and recommending that platforms enhance their algorithmic safety,” he added.

A TikTok spokesperson commented: “TikTok accounts for teenagers come equipped with over 50 safety features and settings that allow for self-expression, discovery, and learning while ensuring safety. Parents can further customize content and privacy settings for their teens through family pairing.”

A Meta spokesperson stated: “I dispute the claims made in this report, citing its limited methodology.

“Millions of teenagers currently use Instagram’s teenage accounts, which offer built-in protections that limit who can contact them, the content they can see, and their time spent on Instagram. Our efforts to utilize automated technology continue in order to remove content that promotes suicide and self-harm.”

Source: www.theguardian.com

Key Elements of Dark Chocolate Might Promote Healthy Aging

Here’s a rewritten version of your content while preserving the HTML structure:

<div id="">
    <p>
        <figure class="ArticleImage">
            <div class="Image__Wrapper">
                <img class="Image" alt="" width="1350" height="900" src="https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg" sizes="(min-width: 1288px) 837px, (min-width: 1024px) calc(57.5vw + 55px), (min-width: 415px) calc(100vw - 40px), calc(70vw + 74px)" srcset="https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg?width=300 300w, https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg?width=400 400w, https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg?width=500 500w, https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg?width=600 600w, https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg?width=700 700w, https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg?width=800 800w, https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg?width=837 837w, https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg?width=900 900w, https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg?width=1003 1003w, https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg?width=1100 1100w, https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg?width=1200 1200w, https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg?width=1300 1300w, https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg?width=1400 1400w, https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg?width=1500 1500w, https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg?width=1600 1600w, https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg?width=1674 1674w, https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg?width=1700 1700w, https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg?width=1800 1800w, https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg?width=1900 1900w, https://images.newscientist.com/wp-content/uploads/2025/05/01134232/SEI_249423817.jpg?width=2006 2006w" loading="eager" fetchpriority="high" data-image-context="Article" data-image-id="2478769" data-caption="Dark chocolate is a particularly rich source of theobromine" data-credit="Studio-N/Shutterstock"/>
            </div>
            <figcaption class="ArticleImageCaption">
                <div class="ArticleImageCaption__CaptionWrapper">
                    <p class="ArticleImageCaption__Title">Dark chocolate is a notable source of theobromine, a beneficial chemical</p>
                    <p class="ArticleImageCaption__Credit">Studio-N/Shutterstock</p>
                </div>
            </figcaption>
        </figure>
    </p>
    <p>While chocolate may be associated with anti-aging benefits, it’s wise to be cautious before indulging. The beneficial compounds are predominantly found in dark chocolate, and the overall health impact of chocolate consumption remains uncertain.</p>
    <p>"There are numerous aspects of dark chocolate, each with its pros and cons," says <a href="https://profiles.ucl.ac.uk/90100-ramy-saad/publications">Rumy Sars</a> from University College London.</p>

    <p>The substance in question, theobromine, is famously known to be toxic to dogs. However, that's just one aspect...</p>
</div>

Feel free to modify any specific terms or phrases further!

Source: www.newscientist.com

Scratching an itch has been proven to promote allergic inflammation in research.

Itching is a dominant symptom of dermatitis (eczema), and scratch promotes skin inflammation, which deteriorates the disease. However, it is almost unknown whether scratching can make the spots and the lord benefit the mechanism that worsens inflammation. New research conducted in the mouse reveals the double nature of scratching. It can worsen skin inflammation, but can also increase immunity against bacterial infections at the site of injury.

Scratch is synergistic with the activation of FCεRI mast cells and promotes inflammation of allergic skin. Image credit: LIU et al。 , Doi: 10.1126/Science.adn9390.

Scratch is an attractive, typical, evolved behavioral reaction to the sensation of itching of the skin.

In many common skin diseases such as dermatitis, prolonged itching is a dominant symptom, indicating a substantial source of affection.

In response to itching, scratch is well -clinically recognized to worsen dermatitis, and some diseases are pathogenic.

However, itching is often a fun feeling and does not cause evasion behavior. This suggests that it can have some benefits to the host.

“Scratch is often fun. This suggests that this behavior must be a profit to evolve,” said Professor Daniel Kaplan of Pittsburgh University.

“Our research helps solve this paradox by providing evidence that scratches also provide bacterial defense against skin infections.”

How to use a new genetic modification mouse model to eliminate the function of neurons that senses itching, called non -peptide giku 2 (NP2), is in the relationship between scratches, injuries, and inflammation. We investigated whether it will affect.

They discovered that they revitalized neurons that sensed the pain that releasing a substance P (SP) when scratched.

However, scratch can worsen problems such as dermatitis, but reducing bacteria can help you to use immune protection. Staphylococcus aureusInfection.

Furthermore, the wound affects the microorganisms in the skin at the damaged site, and can prevent the imbalance of microorganisms, but chronic conditions such as atopic dermatitis complicate this.

The survey suggests that scratching functions as a pathological factor in inflammation and as an evolved mechanism to strengthen protection against infections.

“Discover that scratch improves defense Staphylococcus aureus It suggests that some context may be useful, “said Professor Kaplan.

“But if the itch is chronic, the damage caused by the skin will probably exceed this advantage.”

Survey results It will be displayed in the journal Science

______

Andrew W. Rue et al。 2025. Scratch promotes allergic inflammation and host defense through the activation of nerve gesturing mast cells. Science 387 (6733); DOI: 10.1126/Science.adn9390

Source: www.sci.news

Lisa Nandy urges YouTube and TikTok to promote higher quality content for children

Britain’s Culture Secretary Lisa Nandy has reached out to video-sharing platforms like YouTube and TikTok, urging them to prioritize the promotion of high-quality educational content for children.

Recent data indicates a substantial shift in children’s viewing habits, with a significant decrease in TV consumption over the past decade. Instead, children, aged between 4 and 8, are increasingly turning to platforms like YouTube and TikTok for entertainment, according to Nandy.

During an interview on BBC Radio 4’s Today program, Nandy mentioned the government’s intention to engage in dialogue with these platforms initially, but warned of potential interventions if they do not respond positively.

She emphasized the importance of the high-quality educational content produced in the UK, which plays a crucial role in informing children about the world, supporting their mental well-being and development, and providing entertainment. However, she expressed concerns about the lack of similar quality in content on video-sharing platforms compared to traditional broadcasters.

Former BBC presenter Floella Benjamin, acting as a guest editor on the show, described these platforms as a “wild west” filled with inappropriate content.

Nandy highlighted the government’s efforts to remove harmful content for children and stressed the need to address deeper issues related to the quality of content children consume.

She acknowledged the democratic nature of platforms like YouTube, where individuals can build careers from home, but also emphasized the responsibility to ensure the content is appropriate for young viewers.

Regarding the decrease in funding for children’s television, Nandy mentioned the Young Audiences Content Fund as a positive initiative to boost production. She believed that increasing investment might not be the solution, as the focus should be on reaching all children, including those who do not watch traditional TV.

Despite concerns raised by Benjamin about a crisis in children’s television, Nandy praised the sector as a valuable asset for Britain, from networks like CBeebies to beloved shows like Peppa Pig. She emphasized the government’s role in supporting and nurturing this content, even if it may not be highly profitable.

Nandy admitted the challenges of monitoring her own son’s online activities but commended the platform’s filtering mechanisms and highlighted the positive influence of educational content like news programs.

Skip past newsletter promotions

Nandy confirmed contacting Ofcom to elevate the importance of children’s television in their regulatory considerations and urged a review of public broadcasting, anticipated in the summer.

She stressed the necessity of balancing the influx of investment from platforms like Netflix and Disney with preserving and promoting uniquely British content without overshadowing it.

This involves forming partnerships with public broadcasters to expand online content availability and ensure adequate recognition and support for their contributions, as per Nandy’s statements.

Source: www.theguardian.com

Neglecting easy methods to promote physical activity in our kids

As you prepare to settle in to watch the latest generation of Olympians and Paralympians display their incredible athletic abilities, the irony is unlikely to escape many, especially if you're watching with your kids.

In May, the World Health Organisation reaffirmed that the majority of young people around the world do not get enough exercise, with children in England and Wales being the most physically inactive in the world. As with so many other issues, screens are often the ones to blame here, but as some of our special issue on physical activity highlights (see 'How much exercise do kids really need, and what kind?'), the reality is more complex.

It's true that time spent in front of TVs, iPads, and other devices competes with opportunities for physical activity, and we know that spending time outdoors, in nature, and interacting with others has many benefits that kids who are glued to their screens miss out on. But there are plenty of other reasons why kids are inactive, and often these are easy problems to fix.

Earlier this year we reported that school uniforms may be contributing to the problem by being too restrictive, but this could be easily fixed by simply changing uniform policies. Meanwhile, the emphasis on competitive and elite sport in schools takes the fun out of physical activity and causes many children to lose interest.

This is especially true for girls, whose gender gap in physical activity emerges early in life and widens dramatically in the later grades. The fun gap These include issues with periods, embarrassment about performing in front of boys, etc. Providing separate sports sessions for boys and girls, with an emphasis on activity and play rather than competition, can be a big help.

So while events like the Olympics and Paralympics are inspiring, our conversation should focus less on competitive sport and exercise and more on fun, accessible activities that are easy to incorporate into everyday life for everyone.

topic:

Source: www.newscientist.com

Cloudline, supported by Schmidt Futures, secures $6 million to promote aviation autonomy for a sustainable future.


South African aerospace startup Cloudline is aiming to lead the global frontier of carbon-free autonomous flight and has secured $6 million in funding. The funding comes from supporters including philanthropic venture Schmidt Futures, founded by former Google CEOs Eric Schmidt and Wendy Schmidt. Other supporters include Pan-African Funds such as Raba Partnership, Verod-Kepple Africa Ventures, and 4Di, as well as other venture companies.

The founder and CEO of Cloudline, Spencer Horne, originally intended to build a transportation system that would use lighter-than-air unmanned aerial vehicles to deliver large payloads and connect isolated communities to global supply chains. His interest in the Moonshot project stems from his childhood fascination with trains and passion for transportation technology, particularly aviation.

After spending time at McKinsey and establishing a professional network, Horne returned to Africa to contribute to the field of aeronautics. In 2016, he founded Cloudline at the intersection of technology, transportation, and community impact. The company has since developed an autonomous airship that provides a cost-effective alternative to drones, helicopters, and satellites for real-time data collection in hard-to-reach locations.

Cloudline’s airships can travel more than 400 km with a full payload of 40 kg and fly for up to 10 hours using helium gas and solar power, producing zero emissions and significantly reducing operating costs. The company also combines various sensor data in a single flight, offering solutions for utilities, conservation efforts, and more.

The company has seen a significant increase in revenue and is expected to experience substantial growth in the coming years after signing multi-million dollar enterprise deals. The first-mover advantage and integration of software and hardware give Cloudline a strong market position, particularly in development for the African continent’s specific needs.

Source: techcrunch.com